Precision machining
Precision machining
Precision machining
Precision CNC and MCT turning and milling, wire machining, electrical discharge machining (EDM), laser machining and polishing. We cut hard, brittle, hard-to-machine metals to the dimensions on the drawing.
Precision CNC and MCT turning and milling, wire machining, electrical discharge machining (EDM), laser machining and polishing. We cut hard, brittle, hard-to-machine metals to the dimensions on the drawing.
Precision CNC and MCT turning and milling, wire machining, electrical discharge machining (EDM), laser machining and polishing. We cut hard, brittle, hard-to-machine metals to the dimensions on the drawing.
OVERVIEW
Tungsten, molybdenum and tantalum have high melting points and are hard, so they do not cut like ordinary metals.
Conditions have to be set separately for each material at every stage, and a single part may go through cutting, EDM, laser and polishing in sequence.
Tungsten, molybdenum and tantalum have high melting points and are hard, so they do not cut like ordinary metals.
Conditions have to be set separately for each material at every stage, and a single part may go through cutting, EDM, laser and polishing in sequence.
Tungsten, molybdenum and tantalum have high melting points and are hard, so they do not cut like ordinary metals.
Conditions have to be set separately for each material at every stage, and a single part may go through cutting, EDM, laser and polishing in sequence.
Send us a drawing or a sample and we will review which processes to combine and how, then reply.
We handle anything from a single prototype to repeat production.
Send us a drawing or a sample and we will review which processes to combine and how, then reply.
We handle anything from a single prototype to repeat production.
Send us a drawing or a sample and we will review which processes to combine and how, then reply.
We handle anything from a single prototype to repeat production.
EQUIPMENT
Equipment
Korea Tungsten holds a range of advanced equipment for high-quality precision machining.
Korea Tungsten holds a range of advanced equipment for high-quality precision machining.
Korea Tungsten holds a range of advanced equipment for high-quality precision machining.
High-precision machining center
High-precision machining center
High-precision machining center
CNC machining center
CNC machining center
CNC machining center
CNC lathe
CNC lathe
CNC lathe
CNC horizontal turning center
CNC horizontal turning center
CNC horizontal turning center
Wire EDM machine
Wire EDM machine
Wire EDM machine
Laser welder
Laser welder
Laser welder
CNC automatic lathe
CNC automatic lathe
CNC automatic lathe
5-axis machining center
5-axis machining center
5-axis machining center
Precision general-purpose lathe
Precision general-purpose lathe
Precision general-purpose lathe
General-purpose lathe (TONGIL)
General-purpose lathe (TONGIL)
General-purpose lathe (TONGIL)
Bench lathe
Bench lathe
Bench lathe
Long-bed bench lathe
Long-bed bench lathe
Long-bed bench lathe
Multi-axis precision milling machine
Multi-axis precision milling machine
Multi-axis precision milling machine
Bench drilling machine
Bench drilling machine
Bench drilling machine
Precision form grinder
Precision form grinder
Precision form grinder
Surface grinder
Surface grinder
Surface grinder
Form grinder (with dust collection)
Form grinder (with dust collection)
Form grinder (with dust collection)
Tool grinder
Tool grinder
Tool grinder
Precision grinding cutoff machine
Precision grinding cutoff machine
Precision grinding cutoff machine
Polisher (lapping · polishing)
Polisher (lapping · polishing)
Polisher (lapping · polishing)
Centrifugal barrel finisher
Centrifugal barrel finisher
Centrifugal barrel finisher
Wire EDM machine (FANUC)
Wire EDM machine (FANUC)
Wire EDM machine (FANUC)
Wire EDM machine (FANUC)
Wire EDM machine (FANUC)
Wire EDM machine (FANUC)
EDM machine HA500
EDM machine HA500
EDM machine HA500
EDM machine HSQ1
EDM machine HSQ1
EDM machine HSQ1
Super drill (small-hole EDM)
Super drill (small-hole EDM)
Super drill (small-hole EDM)
Laser cutter
Laser cutter
Laser cutter
Laser cutter (REXBOT)
Laser cutter (REXBOT)
Laser cutter (REXBOT)
Laser marker
Laser marker
Laser marker
Gantry automatic welder
Gantry automatic welder
Gantry automatic welder
Precision spot welder
Precision spot welder
Precision spot welder
Precision machining capability
These are the materials and processes Korea Tungsten actually handles. We advise on tolerances, surface roughness and machining range after reviewing the drawing and your requirements.
These are the materials and processes Korea Tungsten actually handles. We advise on tolerances, surface roughness and machining range after reviewing the drawing and your requirements.
These are the materials and processes Korea Tungsten actually handles. We advise on tolerances, surface roughness and machining range after reviewing the drawing and your requirements.
01
01
Materials
Materials
Materials
W · Mo · Ta · Nb · Re
W · Mo · Ta · Nb · Re
W · Mo · Ta · Nb · Re
Tungsten · molybdenum · tantalum · niobium · rhenium and their alloys
Tungsten · molybdenum · tantalum · niobium · rhenium and their alloys
02
02
Tolerance
Tolerance
Tolerance
Precision tolerances to drawing
Precision tolerances to drawing
Precision tolerances to drawing
We review the material, geometry and machining conditions and advise on the tolerances that apply
We review the material, geometry and machining conditions and advise on the tolerances that apply
03
03
Surface roughness
Surface roughness
Surface roughness
To the required surface roughness
To the required surface roughness
To the required surface roughness
We review the finishing process that fits the application and the required Ra
We review the finishing process that fits the application and the required Ra
04
04
Machining range
Machining range
Machining range
Machining range reviewed per drawing and geometry
Machining range reviewed per drawing and geometry
Machining range reviewed per drawing and geometry
We review feasibility against part size, geometry and material
We review feasibility against part size, geometry and material
05
05
Process
Process
Process
Turning · milling · EDM · laser · polishing
Turning · milling · EDM · laser · polishing
Turning · milling · EDM · laser · polishing
Several processes are combined in sequence on a single part
Several processes are combined in sequence on a single part
06
06
Production
Production
Production
One prototype → repeat production
One prototype → repeat production
One prototype → repeat production
We review the drawing or sample and reply with the process plan
We review the drawing or sample and reply with the process plan
※ The tolerances, surface roughness and machining range that apply vary with the drawing and your requirements. Send us a drawing or a sample and we will review it and reply.
※ The tolerances, surface roughness and machining range that apply vary with the drawing and your requirements. Send us a drawing or a sample and we will review it and reply.
※ The tolerances, surface roughness and machining range that apply vary with the drawing and your requirements. Send us a drawing or a sample and we will review it and reply.
On the machining floor
On the machining floor
On the machining floor
Outside diameter turning
Tungsten stock clamped in a CNC lathe chuck
Tungsten stock clamped in a CNC lathe chuck
Tungsten stock clamped in a CNC lathe chuck
Cutting process
Precision turning under flowing cutting fluid
Precision turning under flowing cutting fluid
Precision turning under flowing cutting fluid
Turned surface
The inner surface of a finished tungsten crucible
The inner surface of a finished tungsten crucible
The inner surface of a finished tungsten crucible
CASE
Machining examples
Parts we have actually machined and delivered. Here is which processes we used, and in what order.
Parts we have actually machined and delivered. Here is which processes we used, and in what order.
Parts we have actually machined and delivered. Here is which processes we used, and in what order.
CASE 01
AlN Heater
CASE 02
Tungsten crucibles for chemical processing
AlN Heater
This part does not end at turning the outside diameter. Holes and threads go inside, and it has to mate with another part to real assembly tolerance. The material is high-purity tungsten bar.
Machining steps
01
Outside diameter turning
High-purity tungsten bar is turned to the outside dimension. The material is hard and eats tooling, so we set the spindle speed and feed that wear it least before starting.
02
Deep-hole and bore work
The deep groove and center hole inside the cylinder are cut out. Holding symmetry, and keeping wall thickness from drifting to one side, is what this step is about.
03
Internal tapping
Several precise threads are cut into the face. This carries the highest risk of breakage in tungsten work, so we use dedicated tooling and fine pitch.
PROCESS
Characteristics of each machining method
Each cutting method applies a different amount of force and produces different geometries. Several methods go into a single part, one after another.
Each cutting method applies a different amount of force and produces different geometries. Several methods go into a single part, one after another.
PROCESS
Characteristics of each machining method
Each cutting method applies a different amount of force and produces different geometries. Several methods go into a single part, one after another.
Process
How it works
When we use it
Turning
Turning
The material turns and a tool is brought in to cut it.
The material turns and a tool is brought in to cut it.
Geometries symmetrical about an axis, such as rod, cylinders and crucibles
Geometries symmetrical about an axis, such as rod, cylinders and crucibles
Milling
Milling
The tool turns and cuts material that is held fixed.
The tool turns and cuts material that is held fixed.
Geometries that are not axially symmetrical, such as flats, grooves and holes
Geometries that are not axially symmetrical, such as flats, grooves and holes
Wire EDM
Wire EDM
A discharge between a fine wire and the material melts through it. No force reaches the material.
A discharge between a fine wire and the material melts through it. No force reaches the material.
For cutting complex outlines from plate or rod
For cutting complex outlines from plate or rod
Sinker EDM
Sinker EDM
An electrode cut to the shape is pushed in and the form is eroded by discharge.
An electrode cut to the shape is pushed in and the form is eroded by discharge.
Fine holes and complex internal structures
Fine holes and complex internal structures
Laser
Laser
Light is focused on one point to melt the material and cut or join it.
Light is focused on one point to melt the material and cut or join it.
Cutting thin plate, machining fine holes, welding
Cutting thin plate, machining fine holes, welding
Grinding and polishing
Grinding and polishing
Abrasive grains grind the surface away.
Abrasive grains grind the surface away.
Finishing dimensional accuracy, lowering surface roughness
Finishing dimensional accuracy, lowering surface roughness
※ Several processes go into a single part in sequence. We advise on which combination fits after reviewing the drawing.
※ Several processes go into a single part in sequence. We advise on which combination fits after reviewing the drawing.
Process
How it works
When we use it
Turning
The material turns and a tool is brought in to cut it.
Geometries symmetrical about an axis, such as rod, cylinders and crucibles
Milling
The tool turns and cuts material that is held fixed.
Geometries that are not axially symmetrical, such as flats, grooves and holes
Wire EDM
A discharge between a fine wire and the material melts through it. No force reaches the material.
For cutting complex outlines from plate or rod
Sinker EDM
An electrode cut to the shape is pushed in and the form is eroded by discharge.
Fine holes and complex internal structures
Laser
Light is focused on one point to melt the material and cut or join it.
Cutting thin plate, machining fine holes, welding
Grinding and polishing
Abrasive grains grind the surface away.
Finishing dimensional accuracy, lowering surface roughness
※ Several processes go into a single part in sequence. We advise on which combination fits after reviewing the drawing.
What this page covers
Sub-categories
01
01
CNC / MCT machining
CNC / MCT machining
CNC / MCT machining
We cut to the dimensions on the drawing by turning, milling and drilling.
We cut to the dimensions on the drawing by turning, milling and drilling.
We cut to the dimensions on the drawing by turning, milling and drilling.
View details
View details
→
→
02
02
Wire and electrical discharge machining
Wire and electrical discharge machining
Wire and electrical discharge machining
Cutting without applying force produces complex geometries even in brittle materials.
Cutting without applying force produces complex geometries even in brittle materials.
Cutting without applying force produces complex geometries even in brittle materials.
View details
View details
→
→
03
03
Laser machining and welding
Laser machining and welding
Laser machining and welding
We drill fine holes, cut thin plate and join it by welding.
We drill fine holes, cut thin plate and join it by welding.
We drill fine holes, cut thin plate and join it by welding.
View details
View details
→
→
04
04
Grinding and polishing
Grinding and polishing
Grinding and polishing
Removing surface roughness raises deposition quality and discharge characteristics.
Removing surface roughness raises deposition quality and discharge characteristics.
Removing surface roughness raises deposition quality and discharge characteristics.
View details
View details
→
→
Advanced material supply and machining,
a global material leader
From raw material to finished part, the best solution seen from your side.
Weekdays 9:00 AM – 5:30 PM (alternate Fridays until 4:00 PM; closed weekends and public holidays)
Advanced material supply and machining,
a global material leader
From raw material to finished part, the best solution seen from your side.
Weekdays 9:00 AM – 5:30 PM (alternate Fridays until 4:00 PM; closed weekends and public holidays)
KOREA TUNGSTEN CO.,LTD
KOREA TUNGSTEN CO.,LTD
Refractory metal supply and ultra-precision machining — core materials for semiconductor, display, defense, space, medical & radiation.
INNOMT LLC
INNOMT CO.,LTD
Korea Tungsten's official overseas division
Key industries served
Customer support
© 2026 Korea Tungsten Co., Ltd. All rights reserved. 83 Bideukbawi-gil, Jori-eup, Paju-si, Gyeonggi-do 10949, Korea (364-2 Osan-ri) +82-31-975-1717
© 2026 INNOMT Co., Ltd. All rights reserved. Unit A-1710, IS Biz Tower Hangang 3, 50 Eutteum-ro, Deogyang-gu, Goyang-si, Gyeonggi-do 10543, Korea +82-2-6408-4239
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KOREA TUNGSTEN CO.,LTD
KOREA TUNGSTEN CO.,LTD
Refractory metal supply and ultra-precision machining — core materials for semiconductor, display, defense, space, medical & radiation.
INNOMT LLC
INNOMT CO.,LTD
Korea Tungsten's official overseas division
Key industries served
Customer support
© 2026 Korea Tungsten Co., Ltd. All rights reserved. 83 Bideukbawi-gil, Jori-eup, Paju-si, Gyeonggi-do 10949, Korea (364-2 Osan-ri) +82-31-975-1717
© 2026 INNOMT Co., Ltd. All rights reserved. Unit A-1710, IS Biz Tower Hangang 3, 50 Eutteum-ro, Deogyang-gu, Goyang-si, Gyeonggi-do 10543, Korea +82-2-6408-4239
Privacy Policy
Terms of Use
Cookie settings
KOREA TUNGSTEN CO.,LTD
KOREA TUNGSTEN CO.,LTD
Refractory metal supply and ultra-precision machining — core materials for semiconductor, display, defense, space, medical & radiation.
INNOMT LLC
INNOMT CO.,LTD
Korea Tungsten's official overseas division
Key industries served
Customer support
© 2026 Korea Tungsten Co., Ltd. All rights reserved. 83 Bideukbawi-gil, Jori-eup, Paju-si, Gyeonggi-do 10949, Korea (364-2 Osan-ri) +82-31-975-1717
© 2026 INNOMT Co., Ltd. All rights reserved. Unit A-1710, IS Biz Tower Hangang 3, 50 Eutteum-ro, Deogyang-gu, Goyang-si, Gyeonggi-do 10543, Korea +82-2-6408-4239
Privacy Policy
Terms of Use
Cookie settings